<div class="jumbotron text-center">
  <h2 class="display-4">
    Hello, world!
  </h2>
  <p class="lead">
    This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information.
  </p>
  <hr class="my-4">
  <p>
    It uses utility classes for typography and spacing to space content out within the larger container.
  </p>
  <a class="btn btn-primary btn-lg" href="#" role="button">
    Learn more
  </a>
</div>